Perpetual calendar.



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No; 884,532.. PATENTED APR. 14, 1908.

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PERPETUAL CALENDAR.'

.IPLITION FILED SEPT. 30, 1 90'1.

WMM@ seo SOL SIPSER, OF NEW YORK, N. Y.

PERPETUAL CALENDAR. v

Application filed September 30, 1907.

Specification of Letters Patent.

Patented April 14, 1908.

Serial No. 395,221.

To all whom it may concern:

Be it known that 1, SOL SIPsER, citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Perpetual Calendars, of which the following is a specification.

My invention relates to perpetual calendars and it has for its object to provide an extremely simple and inexpensive device of the character described, which is adapted for use as a watch charm, and my invention consists in the novel construction, arrangement and combination of parts as hereinafter fully described, illustrated in the drawing and pointed out in the appended claim.

ln the drawing :-Figure 1 is a front view of my improved calendar. Fig. 2 is a rear view thereof. Fig. 3 is a detail view of the upper or front disk of the device. Fig. 4 is a li e view of the intermediate disk, and Fig. 5 a detail view of the bottom disk, and Fig. 6 is a rear view of the intermediate disk. Fig. 7 is a central sectional view of the device.

1n constructing my device I provide three sections or disks, comprising the front or upper disk 1, the intermediate disk 2 and the bottom disk 3'. These disks are all mounted upon a common pivot 4, centrally arranged as shown, and each of the disks can be rotated upon the pivot independently of the others.

The upper disk 1 is provided with the days of the week provided in spaces 5 formed by lines 6 which converge slightly at one end. The disk 1 is cut away at its peripheral edge to form a tapering recess 7 bounded by the radial edges 8 and the curved edge 9.

The intermediate disk 2 is provided upon its upper face adjacent its periphery with numerals running from 1 to 31 to indicate the days of the month, and these numerals are contained in tapering spaces 10 formed by radial lines 11. The lines 6 and 11 are adapted to coincide when either of the disks 1, 2 is rotated so as to bring the spaces containing the days of the week on disk 1 opposite to the spaces containing the aforesaid numerals on disk 2. The extent of the recess 7 is such as to expose seven of the numerals at a time, one for each day of the week.

Upon its reverse or lower face the disk 2 is provided adjacent its periphery, with the names of the month, (or abbreviations thereof) together with the number of days contained in the respective months, and these are contained in spaces 12 formed by radial lines 13. Y

The lower or bottom disk 3 is cut away at its peripheral portion to form a tapering recess 14 of a length corresponding to that of each of the spaces 12 and adapted to coincide with the latter to expose to view the names of the months and number of days therein appearing in said spaces.

The several disks are referably of equal diameters and in assembling them upon the pivot they are preferably made to iit sufliciently tight upon the pivot to prevent them turning too freely upon said pivot and yet adapt them to be rotated thereon by applying a slight pressure by the fingers when it is desired to derive information regarding some future calendar date.

In order to ada t the device to be worn as a Watch charm, provide the central disk with an ear 15 having a perforation 16 to ada t it to be suspended from a watch chain.

Tie device may be made of gold, silver, aluminium or any other ,desired metal or metals and any suitable ornamentation or inscription, advertising matter etc., may be provided upon the upper and lower disks or eitherof them if desired.

1n using the device the disk 1 is turned until the s aces thereon containing the days of the wee i coincide with the proper spaces on disk 2 containing the numerals lndicating the days of the month. The disk 3 is also turned until the space 14 exposes the proper month on disk 2. Now, if it be then desired to ascertain upon what day of the week a certain day in any other month will fall upon, or vice versa, it is only necessary to turn the disk 2 until the name of the month appears opposite recess 14, the upper faces ol disks 1 and 2 then disclosing the information sought. During the said turning movement of disk 2, care must be taken not to disturb the relative positions of disks 1 and 3, otherwise it would result in the device not indicating accurately.

What I claim is In a device of the character described, the combination of three concentrically pivoted disks 1, 2 and 3, adapted for rotation independently of each other, the upper disk 1 .having a tapering peripheral recess and divided on its uppler face into spaces containing the names of t e days of the week across its upper face, the intermediate disk 2 on its upper face adjacent to its periphery being dii vided into spaces containlng numerals indieating days of the month, the spaces containing` the names of the days of the Week on the upper disk being adapted to coincide with the spaces on the intermediate diskI and the length of the recess in the upper disk being such that it will expose seven of the spaces on the intermediate disk, and said latter disk being divided on its lower face into spaces containing' the names of the months and the number of days in the reprovided with a recess adapted to coincide with each of the spaces on the lower face of 15 the intermediate disk and eXpose the names of the months and number of days therein appearing in said spaces.

In testimony whereof I affix my signature in presence of two Witnesses.

i SOL SIPSER. Witnesses LLOYD A. DoUGLAss, S. E. OBERLIN. 

